The game suddenly loses all power with a pop (here during a code update) and stays dead. Inside the power supply a small disc component has burst.
Game dies with a pop and won't power up: failed power supply (burst MOV)
Cause: The surge-protection component (a metal oxide varistor, MOV) in the power supply failed, either from a mains surge, an internal fault or a poor connection.
Checks
- Unplug the game and look inside the power supply for a burnt or burst disc part near the AC input.
- Inspect the power supply connectors and the plugs feeding the other boards for loose or darkened pins.
Fix
- Replace the power supply (or have the failed part and anything it damaged replaced by someone qualified).
- Run the game from a proper surge protector, not just a power strip.
The power supply works at line voltage. Unplug the game and let it sit before opening the supply.
Systems
Games
Source: Pinball Repair help group!! (Facebook group)